The plan is to make a kit that takes a full sized Mini-ITX board, so it's going to be fat (the rear connectors aperture alone is >1.5"). You're welcome to call it a luggable if you want.
I haven't designed the case yet, but do have a fully battery powered proof-of-concept (NOTE: I had a slightly more elegant setup at the show than in the video).
My goal right now is to get a full prototype designed.
Hans
That's is really cool idea, let it be slightly fatter than 1,5 inch. I hope you will finalize your project and we will eventually get portable AMI. Can't wait for that.